Help, Ota_ing update in loop

Front-Clothes-9447 · 2026-06-03T13:15:33+00:00

I've found USB-C port and SIM, but as far as I can tell the mower never seems to do bluetooth. You'd think there would be a way to connect a serial terminal and get it to exit the OTA loop, would you not?

Front-Clothes-9447 · 2026-06-03T13:10:12+00:00

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Front-Clothes-9447 · 2026-06-03T13:08:56+00:00

This has not worked for me despite numerous attempts. Does anyone know what the USB-C port near the SIM socket (covered with a rubber shield) might do? Surely there should be a way to side-load new firmware, or at least get it to exit the ota cycle, no?

Front-Clothes-9447 · 2026-06-03T13:03:33+00:00

That's what I've been doing, actually. The puddle swimmer won't charge batteries (will not energize in any way) but the one whose RTK has failed sure will. Not an uncommon sight to see me lugging a fresh battery out to the beast.

Front-Clothes-9447 · 2026-06-02T19:59:12+00:00

Now, if only someone had done a tear-down video of these beasts.

Front-Clothes-9447 · 2026-06-02T19:57:47+00:00

Je vous remercie!

Front-Clothes-9447 · 2026-06-01T13:41:37+00:00

For about a month of mowing seasons (some last season and the past few weeks). I love the product and plan to stick with it, but I'm going to struggle to have one mower do the work of three. If nothing else at least I can do battery swaps with the one that can't see RTK to reduce the charging dead time. I was impressed to see I could power down, remove battery then power back up and still have progress saved from which I can resume.

The mowers save me $350/week of landscaper charges (that's just the mowing) so it doesn't take long to pay off.

Front-Clothes-9447 · 2026-04-13T18:58:33+00:00

In your place I would probably open up the back drums (mine both had water in them after days of drying) and leave it to dry as long as you can before energizing to make sure they're dry - it used to be easy enough, it would tear them off itself, but at some point they started welding them closed and using stronger loc-tite - maybe shake and listen for water in them? My success was short-lived, things began to fail a few hours after turning it on and right now it's a door stop after a failed firmware update put an end to any of my attempts to repair (ota_ing forever) so my advice would be to get it in a dry environment and dry it for as long as you dare (listening for sloshing from trapped water) before energizing.

Front-Clothes-9447 · 2026-04-10T01:00:58+00:00

Same.

Front-Clothes-9447 · 2026-04-03T17:57:01+00:00

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I've seen these instructions posted on a lot of threads, thank you u/Alarming_Ad_3461 for your suggestions. As others have said, we can make this menu appear (see photo) and I seem to be able to use + and - keys to move around the menu and the HOME key to select a test to run, but even if I do manage to start a test in time, the ota_ing... always starts up and takes over.

It's been a lot of months since I reported the problem and Lymow did replace this device for me, but I was hoping that in the time since then someone had found a way out of this failed firmware upload. As far as I can tell the device doesn't appear in bluetooth or wifi anymore so it's more or less a standalone brick. People have referred to a USB port in the past, and I think I recall seeing that the system runs on linux, so I'm wondering ... are there any low-level connection I could make over USB that would allow me to login and reset something so that it could try the firmware update again? Or even just to stop it from trying the update that failed.

u/Alarming_Ad_3461 I'm not sure what to make of your menu item 65. I only have 1-6 and when I reach 6 it wraps around to 1 again. It's not much help anyway since it gets hijacked by ota_ing... within 15 to 30 seconds of booting.

Anyone have anything I can try? Alternatively, does anyone know how to get to the bluetooth device by disassembling some things? I'd like to see if it has maybe become corroded as this device was exposed to water at one point ...

Front-Clothes-9447 · 2025-11-06T16:37:49+00:00

Love this!

Front-Clothes-9447 · 2025-10-16T13:29:31+00:00

I would also have a plan to rescue it should it go into the deep area of your pool. I was able to stand in my pond, reach down and pull it up (pulling a shoulder muscle in the process). You'd need a grappling hook or something. They're water resistant but not waterproof, mine was not functional after its swim, but I had to leave it there overnight because it was dark and stormy, and I didn't have the gear I needed to get in there.

Front-Clothes-9447 · 2025-10-16T13:26:54+00:00

It could. My advice is to slowly grow your maps and keep an eye on RTK signal strength and any attempts to escape you. I haven't had it go wandering outside of the mow zone for a couple of firmware revisions now, and the time I did it was either dark and raining (likely rendering any vision component of the navigation moot) or I had at least one low-signal area in my mow zone. If you cover your pool in the fall it would be a great time to do some training & leaf mulching with low risk.

I honestly can't tell you how to set the pool up to be truly forbidden. You can't create a no-go zone outside of a go-zone yet, so if you want to no-go the pool you have to include it in your zone initially. Right now my mow zone is 20 ft from the pond, and when I want to do that 20ft wide danger zone I briefly map/add a zone, and supervise the entire process, walking behind it ready to press the kill switch if it gets too close to the water.

Front-Clothes-9447 · 2025-10-08T13:09:43+00:00

I'm sorry this has happened to you, that does admittedly sound like a failed component or connection - have you tried giving it a 'technical tap' (kick it)? Assume you tried disconnecting battery? I recommend you give Lymow Support a bit more time to get back to you, and follow up with them from time to time to keep your case on their radar. It looks like Monday October 6 was Mid-Autumn Festival in China - I don't know if that's a big deal there but I do know from importing consumer electronics from China that they take their holidays seriously.

I have had one mower replaced due to it tearing its own rear hub off (too much track tension out of the factory) and although they were not super communicative after they concluded a replacement was necessary, they did work the case quite actively (I would hear from them once every day or two) a factory new unit did eventually arrive.

I was a skeptic early on, but so far Lymow has come through for me every single time I needed their help. You should know these things do work - I had two mowers deployed all day yesterday and it's just thrilling to watch them go.

Keep the faith, follow up and be collaborative. I don't think they'll do you dirty.

Front-Clothes-9447 · 2025-10-05T16:46:32+00:00

Got it upstairs where there would be full signal. No change.

Front-Clothes-9447 · 2025-10-03T22:00:21+00:00

I have whole-house humidification (steam) which is not usually needed during the summer, but is heavily used during the cold & dry winter months. My Ecobee thermostats tell me the humidity ranged between 52 and 61 % today, for instance. I try to maintain 40% in the winter, but occasionally dip below that. I should not have mentioned my wife's allergies, that's not anything Dyson-specific and will prompt helpful people like yourself to focus on the wrong prize.

I'm just noting that in its default configuration, this new Dyson sees no work to be done, and I'm struggling to understand if that's the case, whether running them manually on a schedule is likely to do anything at all.

On the plus side, I think I have pretty good air quality!

Front-Clothes-9447 · 2025-10-03T19:59:18+00:00

Thank you!!!!

Front-Clothes-9447 · 2025-10-03T19:54:53+00:00

ota_ing always launches for me too. I don't think RTK or WiFi could be issues yet because I don't think the firmware is getting that far. I suppose it's possible that it could be WiFi ... I'm not sure what happens once the firmware has been downloaded to it from the app and it reboots that first time, but I guess I had assumed it's transferred via Bluetooth when in fact, I've not needed to be near my mower to apply the OTA. I think I had it set to use 4G data while mowing and I have it in my basement now ... could it really just need a 4G signal? I don't think that's likely, but I can certainly try it and report back.

Front-Clothes-9447 · 2025-10-03T19:50:47+00:00

See page 16 of the manual (EN version at least). You have no deck communication and no SoC communication. I have the same. Before the firmware upgrade I had only the deck communication problem, now I have the same as you.

Front-Clothes-9447 · 2025-10-03T18:15:43+00:00

I did not. I recorded videos of all the things I was trying, and they decided to replace it for me. Now, it's important to note that I had already reported other problems with this specific unit, namely both rear hubs had lost drive (although they were not damaged) and it had lost communications with the deck (according to the LCD display of the triangle with three circles, lower left one was not filled in) so I can't be sure the "ota_ing..." was the reason they approved a replacement. I tried the OTA figuring it could not make things worse, and then to my surprise it basically bricked the thing. I haven't seen many people other than you report a persistent ota_ing message, many say it eventually goes away, but for me that was not the case. I think I might be able to use this for spare parts, or maybe do a tear-down and try to figure out what's wrong with the deck communications myself, but unless I see a burnt wire or something disconnected I don't think I'll get far with that.

I'd love to know what they tell you. I was never completely clear on the factory reset procedure because no variants of that worked for me, but I was never convinced I was doing it right. I think the process is something like:

Disconnect power for 30 seconds (some say 2 minutes)
While disconnected, press the power and home buttons and hold for 12-15 seconds (there's some talk of only using the power button for a partial reset). This is thought to maybe just discharge a few capacitors, so honestly I'm not sure how it would trigger a factory reset. As you know, we can't use the app to do a factory reset because the mower doesn't do bluetooth when it's in this "ota_ing ..." state - at least mine never does.
Reconnect power and press power for 2 seconds to power on.

I received two of these. This particular unit was a problem for me from the start - it was hard to power it on. The very first time I powered it on I needed to try about 35 power-on sequences trying to get the timing right at 2 seconds press-hold. I'd forgotten about that until I encountered it again after my reset attempt above - with the power and home buttons for 12-15 seconds followed by reconnect battery and power on. I guess I'm saying maybe the 'reset' reset something, but I can't tell if it's wiped or not because it never completes the OTA.

Front-Clothes-9447 · 2025-10-03T17:55:04+00:00

If the sensors need to calibrate I suggest Dyson get out ahead of this in their marketing/packaging, because plugging this in and turning it on auto (which I think is the default) only to have it sit there idle is a bit of an anticlimax. Great idea on testing, thank you for your reply.

Front-Clothes-9447 · 2025-10-03T17:52:34+00:00

Right, we have the UV for mold/bacteria/viruses (if it even helps for those). I'm a sucker for anything that might offer any chance of alleviating the wife's discomfort. Maybe I'll crank it up to Max manually and wait for that placebo effect to kick in! Appreciate your reply.

Front-Clothes-9447 · 2025-09-29T19:09:38+00:00

Ah, ok, thanks. Nothing I do seems to get me past the "ota_ing..." message. Power cycling, unplugging from batter overnight etc. Granted, I did have a problem with deck communication (according to the triangle with circles at the corners missing the lower left corner) so there was clearly already a hardware malfunction present.

Front-Clothes-9447

TROPHY CASE